Scripts: Add dist/install-codex.sh and update Makefile

Signed-off-by: Michael Mayer <michael@photoprism.app>

scripts/dist/Makefile

@@ -36,6 +36,8 @@ install-tensorflow:
 tensorflow-gpu: install-tensorflow-gpu
 install-tensorflow-gpu:
 	/scripts/install-tensorflow.sh gpu
+codex:
+	/scripts/install-codex.sh
 davfs: install-davfs
 install-davfs:
 	/scripts/install-davfs.sh

scripts/dist/install-codex.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# Installs the Codex CLI coding agent on Linux.
+# bash <(curl -s https://raw.githubusercontent.com/photoprism/photoprism/develop/scripts/dist/install-codex.sh)
+
+set -Eeuo pipefail
+
+echo "Installing Codex CLI..."
+
+# Ensure npm exists
+if ! command -v npm >/dev/null 2>&1; then
+  echo "ERROR: npm not found. Please install Node.js (npm) and re-run." >&2
+  exit 1
+fi
+
+# Create CODEX_HOME if set (and not '/')
+if [ -n "${CODEX_HOME:-}" ]; then
+  if [ "${CODEX_HOME}" = "/" ]; then
+    echo "ERROR: refusing to use CODEX_HOME='/'" >&2
+    exit 2
+  fi
+  install -d -m 700 -- "${CODEX_HOME}"
+fi
+
+# Choose sudo only if available and not already root
+SUDO=""
+if command -v sudo >/dev/null 2>&1 && [ "$(id -u)" -ne 0 ]; then
+  SUDO="sudo"
+fi
+
+# Some npm versions don’t support --location=global; detect and adapt
+if npm help install 2>/dev/null | grep -q -- '--location'; then
+  NPM_GLOBAL_OPTS=(install -g --location=global --no-fund --no-audit)
+else
+  NPM_GLOBAL_OPTS=(install -g --no-fund --no-audit)
+fi
+
+# Install / update Codex CLI
+$SUDO npm "${NPM_GLOBAL_OPTS[@]}" "@openai/codex@latest"
+
+# Show result
+if command -v codex >/dev/null 2>&1; then
+  echo "Codex installed at: $(command -v codex)"
+  codex --version || true
+fi
+
+echo "Done."